Dumas is an experienced and reliable underground mining contractor, focused on mine development projects spanning across the Americas.

Since beginning our operations in 1994, Dumas has grown to become one of Canada’s largest mining contracting firms. We pride ourselves on our ability to meet our clients’ needs time and time again.

When it comes to safety, status quo is simply not enough; Dumas constantly seeks new and better ways to get the job done efficiently and with Zero Harm. We are proud of our culture of safety innovation, and honoured to be the recipient of several prestigious industry awards.

Dumas fosters a philanthropic spirit across our employee base and continuously strives to be a responsible corporate citizen through a commitment to employing locally in the communities where we work, supporting training initiatives, sponsoring community events, and encouraging employee participation.

Joining Dumas is an opportunity to build and develop a rewarding career and be part of a dynamic and energetic team. Our people are our greatest asset; our dedicated employees and our many years of experience make Dumas the easy choice for mining companies seeking an underground mining contractor.

C.Y. Thomas Li​​
C.Y. Thomas Li​​ Chairman – G.L. Tiley & Associates Ltd.
"Dumas is an innovative shaft construction company, they have many years of shaft construction experience and with an excellent track record on construction safety and cost controls.“
Dan Gagnon
Dan Gagnon President and CEO, Gowest Gold Ltd.
Dumas is a professional and dependable mining contractor that provides Gowest Gold with competent personnel to efficiently complete the underground development, the underground construction, and the production mucking at our Bradshaw Deposit. The Dumas team is fully committed to our operational success and have implemented a great culture focused on safe production and the attainment of production goals.
Rob Carter
Rob Carter - Vice President, Manitoba Business Unit, Hudbay Minerals Inc.
Dumas Contracting has been an integral part of Hudbay’s mining team at our Lalor Mine. They have provided a full-service lateral and vertical development advance, construction and mechanical team that works closely with our people, embracing Hudbay’s core values and our “one team one vision” approach to work management. Lalor has transitioned from a base metal mine to a gold operation, and mining of the gold and copper-gold zones at current production rates would not have been possible without the full support of the Dumas team.
Rocky McLellan
Rocky McLellan-​ General Manager North American Underground Operations​
“Major Drilling has partnered with Dumas on multiple projects. The expertise within each company have created a synergy that compliments both groups to provide superior performance for our clients on Projects throughout North America.” 
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